1) The correct answer is: B) Developing
The word develop means to invent something or bring something into existence. Refine refers to the improvement of the idea by making small changes, that means the idea already exists, it is only modified.
2) The correct answer is: A) Refining
The word focus refers to pay attention to something, in this case an idea. From the options given, refine is the best choice as the idea already exists and improvement is needed. To do that, you need to focus on it paying attention to the small details.
3) The correct answer is: B) Well
Remember the difference between good and well is that the first one is and adjetive so it is used to modify nouns, and the second one is an adverd used to modify verbs. Fore example: you can be a good citizen, or you can read a good book. In the other hand: the car ran well or the kid played well.
4) The correct answer is: B) Tastier
Remember that to make comparatives and superlatives an -er or -est is used with most of one syllable adjectives and with certain two syllable ones. In this case more or most is not used because tasty has only two syllables. And you use the -er because you are comparing the meal with others.
